I recommend buying a thick trench coat, then approach a stranger or a group of strangers (preferable young girls in school uniform), then ask them if they would like to buy some counterfiet jewlery or candy or weed or whatever, then, when they reply (it doesn’t matter if they say yes or no), flamboyantly whisk your coat open and reveal ALL of yourself and shout
“HERE I AM!”
I guarantee that will make you a shower :D
Alternatively, if you mean a shower as in the type that sprays water onto naked people, I suggest communication with your shower faucet. I think you’ll be surprised how witty and informative faucets can be when spoken to nicely.
Good hunting.